#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<assert.h>
void* my_memcpy(void* dest, const void* src, size_t num)
{
	void* ret = dest;
	assert(dest && src);
	for (int i = 0; i < num; i++)
	{
		*(char*)dest = *(char*)src;
		//dest = (char*)dest+1;
		//src = (char*)src + 1;
		((char*)src)++;
		((char*)dest)++;
	}
	return ret;
}

int main()
{
	int arr1[] = { 1,2,3,4,5,6 };
	int arr2[20] = { 0 };
	my_memcpy(arr2, arr1, 3*sizeof(int));
	for (int i = 0; i < 3; i++)
	{
		printf("%d ", arr2[i]);
	}
	return 0;
}